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Vladimir Ibraghimov

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MATH PUZZLE: Can you replace the question mark with a number?

Levi's patented

In 1873, Jacob W Davis of Reno, Nevada, received a U.S. patent (No.139,121) on a rivet process for strengthening the pocket openings of canvas pants. He assigned the patent to himself and Levi Strauss, as his business partner. Jacob Davis was in charge of manufacturing when Levi Strauss & Co. opened its two San Francisco factories. Sometime during 1873, the first riveted clothing was made and sold. (The exact date is unknown; the company's historic records were lost in the 1906 San Francisco earthquake and fire.) For nearly 20 years, Levi Strauss & Co. was the only company making riveted clothing, until the patent expired around 1891. Thereafter, dozens of garment manufacturers began to imitate the original riveted clothing.

It was the annual homecoming d...

It was the annual homecoming dance at the local high school gym. Most of the young folk were out on the dance floor but a few young men and women lined the sides of the gym, hoping for a dance partner to ask them out onto the dance floor.
After waiting anxiously for quite a while, a rather awkward freshman finally got up the nerve to ask a pretty junior for a dance at the homecoming.
She gave him the once-over and said, "Sorry, I won't dance with a child."
"Please forgive me," responded the underclassman. "I didn't realize you were pregnant."
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